ADV Sensors
ADV001 Latching Bipolar Digital Switches
Features:
•
•
•
•
Latching bipolar operation (south field ON, north field OFF)
Extremely low operate points for high sensitivity and wide airgaps
Digital switch output
MSOP8 and TDFN6 packages
Description:
The ADV001 is a GMR Digital Switch™ product using a unique bipolar output GMR material. This
material allows a sensor with a negative (south pole) operate point and a positive (north pole) release point.
The sensor can provide two travel limits with a single sensor, or be used with alternating north / south pole
magnetic encoders.
The sensor is extremely sensitive with typical operate/release points of ±4 oersteds. Operate points are
also extremely stable over a temperature range of −40°C to +125°C. The high sensitivity and excellent
temperature stability give the ADV001 better airgap performance and switching precision than other
products. The output is on/off current-sinking. The IC is available in an MSOP8 (part number
ADV001-00E) or 2.5 mm x 2.5 mm TDFN6 package (part number ADV001-10E).
The following specifications are valid over all operating voltage and temperature ranges:
Parameter
Magnetic Operate Point1
Magnetic Release Point1
Operate/Release Differential
Off-Axis Field
Operating Supply Voltage (VCC)
Quiescent Supply Current
(VCC = 12 V)
Output Drive Current
VOL
(VCC ≥ 5 V;
20 mA output sink current2)
Frequency Response
Temperature Range of Operation
Min.
−10
0
2
Typ.
−4
4
4.5
Max.
0
10
12
250
30
Units
Oersteds
Oersteds
Oersteds
Oersteds
Volts
2.5
0
4.5
20
mA
mA
0.4
Volts
KHz
°C
100
−40
125
Notes:
1. VOL at VCC = 4.5 V may exceed 0.4 V.
2. 1 Oe (Oersted) = 1 Gauss in air = 0.1 mT.
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ADV Sensors
Functional Block Diagram and Pinout
ADV001-00E
Vcc
Out
N/C
N/C
Output
Direction
of Sensitivity
GMR
Sensor
N/C
N/C
N/C
Ground
Operation
The magnetic field should be applied in the plane of the IC package in the direction of sensitivity (the
cross-axis direction). The output is open collector, so an external pull-up resistor is required. The
output is configured for pull-down when “ON.”
The charts below show the response of the ADV001 bipolar sensor compared to typical sensors, which
are “omnipolar”:
Output
On
Output
On
On
Off
Off
Field
Field
Figure 1a: Typical
magnetic switch.
Figure 1b: ADV001
bipolar magnetic sensor.
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ADV Sensors
The following figures illustrate the sensor’s operation:
S
S
a
lftiien
Co
n
N
VdE
N
N
ON
OFF
ON
OFF
OFF
Figure 2a.
Figure 2b.
ON
OFF
Figure 2c.
Figure 2d.
A south magnetic field on the pin 8 side of the part (or a north field on the pin 1 side) turns the sensor
on (Figure 2b). The output remains latched on (Figure 2c) until an opposite field is applied (Figure 2d).
Typical Applications
Ring-magnet encoder
As illustrated in Fig. 3a, ADV001 sensors are ideal to detect the alternating north and south poles of a ringmagnet. Because of their extraordinary sensitivity, the sensors can be position a large distance from the
ring magnet.
Linear actuator with two travel limits
ADV001 sensors can provide two travel limits with a single sensor, by positioning a north magnet pole at
one limit, and a south pole at the other as illustrated below. The sensor output toggles at each limit, and can
be used to set the direction of a reciprocating linear actuator as shown in Fig. 3b.
Rotation
Ac
tu
ato
rT
rav
el
South
North
Figure 3a. Ring-magnet encoder.
Figure 3b. Linear actuator with two travel limits.
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ADV Sensors
Package Drawings and Specifications
MSOP8 (ADV001-00E)
.118
(3.00)
.118 (3.00)
.193 (4.90)
NVE
XXX
.118 (3.00)
.021 (.533)
.154 (3.91)
.012 TYP.
.034 (.86)
.040 (1.02)
Dimensions: inches (mm)
.0256 (.65) X 6
.004 (.102) min
.012 (.305) max
Notes:
1. The MSOP8 package has thermal power dissipation of 320°C/Watt in free air.
2. Thermal performance is improved when the package is soldered to a circuit board.
2.5 mm x 2.5 mm TDFN6 (ADV001-10E)
2.00 ± 0.05
0.80 MAX.
6
4
6
2.50±0.10
1.30±0.05
4
C0.10
PIN 1
ID
1
1
3
3
0.30±0.05
(6X)
2.50 ± 0.10
0.0-0.05
0.30±0.05
0.65 TYP.
(4X)
1.30 REF (2X)
0.20 REF
dimensions in mm
Notes:
1. The TDFN6 package has thermal power dissipation of 320°C/Watt in free air.
2. Thermal performance is improved when the package is soldered to a circuit board.
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ADV Sensors
Package
Pinout
VCC
Ground
Out
MSOP8
(ADV001-00E)
Pin 1
Pin 5
Pin 8
TDFN6
(ADV001-10E)
Pin 1
Pin 4
Pin 6
©NVE Corporation
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent
of the copyright owner.
SB-00-016
March 2016
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ADV Sensors
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